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Finding the Fourth Proportional to 66,859.70, 92,252.75 and 39,623.78

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Solution

The fourth proportional to 66,859.70, 92,252.75 and 39,623.78 is: 54,672.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,859.70 : 92,252.75 = 39,623.78 : x
  2. Step 2: Convert to fraction form
    66,859.70/92,252.75 = 39,623.78/x
  3. Step 3: Cross multiply
    66,859.70x = 92,252.75 × 39,623.78
  4. Step 4: Simplify right side
    66,859.70x = 3,655,402,702.91
  5. Step 5: Solve for x
    x = 3,655,402,702.91/66,859.70
  6. Step 6: Final answer
    x = 54,672.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.